KR101519235B1 - Apparatus for smart security CCTV system based on wireless sensor networks and Control method thereof - Google Patents

Abstract

The present invention relates to a smart security CCTV system and a control method thereof. The smart security CCTV system has a sensor node which is implemented based on a wireless sensor network on an installation target and recognizes the movement of the installation target mounted with the acceleration sensor included in the sensor node to track the object. Accordingly, the smart security CCTV system controls a PTZ camera efficiently to track the moving object through a large area while decreasing the computation amount required for image processing and enables the sensor node to be flexibility mounted by implementing a wireless mesh network, thereby increasing the efficiency of the installation process.

Description

Technical Field [0001] The present invention relates to a smart security CCTV system based on a wireless sensor network and a control method thereof,

The present invention relates to a smart security CCTV system using a wireless sensor network and GPS information. More particularly, the present invention relates to a wireless sensor network, a sensor node based on a wireless sensor network, a sensor node sensing a movement of a facility equipped with the acceleration sensor, The present invention relates to a wireless sensor network-based smart security CCTV system capable of tracking an object by GPS information of a node and a control method thereof.

Recently, video surveillance system has been used to improve security and stability of surveillance and control systems used in various industries such as power, gas, oil, and facility security.

However, most of the image security system is constructed and operated as a separate system from the monitoring and control system, and passive monitoring by the operator is mainly made up. Therefore, it is difficult to cope instantly when an accident occurs, and it is difficult to manage and utilize. If an active video surveillance system capable of informing the operator of an immediate situation in case of an accident and an existing surveillance control system and unified surveillance are available, the utilization will be higher and the reliability of the system operation will be enhanced.

Recently, researches on intelligent technology for automatically tracking a moving object using a PTZ (Pan-Tilt Zooming) camera have been actively conducted. The object tracking using the existing PTZ camera was performed by analyzing the image acquired through the camera and detecting the movement of the object.

However, this method requires a lot of hardware cost because of the complicated algorithm for image processing. In addition, there is a disadvantage in that it is difficult to cope with the case where an invalid image is acquired due to changes in the surrounding environment or image noise, or when acquisition of the image itself is impossible when the eye and boiling are lowered. In addition, there is a limitation in installation using wired communication, and there is a problem that monitoring can not be performed if communication is interrupted because the CCTV internal storage device is not provided.

Korean Patent Publication No. 10-2000-0059273 (October 05, 2000)

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art, and it is an object of the present invention to efficiently control a PTZ camera so as to track a wide area moving object while reducing the amount of computation required for image processing, The present invention provides a smart security CCTV system based on a wireless sensor network and a control method thereof, which improves installation efficiency by implementing a wireless mesh network.

According to an aspect of the present invention, there is provided a smart security CCTV system based on a wireless sensor network, including: a sensor node for detecting occurrence of an event of an object and transmitting its ID and GPS information; The distance between the CCTV camera position and the event generating sensor node position from the GPS information transmitted from the sensor node and the GPS information of the CCTV camera, and the distance between the current CCTV directing position and the event generating sensor node position, A smart CCTV module for controlling PTZ (Pan-Tilt Zooming) of the CCTV camera and capturing, storing and transmitting the image of the CCTV camera; And a control integration server for receiving images from the smart CCTV module, checking the events, and remotely controlling the smart CCTV module in real time to receive local conditions.

The GPS information includes: Latitude, longitude, and altitude coordinate data.

The sensor node comprising: A sensing collection module for collecting information on at least one of acceleration, temperature, humidity, and GPS information according to occurrence of an event; And a wireless network control module for transmitting the collected information from the sensing collection module to the control integrated server through a wireless standard signal.

The sensor node comprising: When an event is sensed from the sensing collection module in the sleep state, the sensor node is converted into an active state, and the ID of the sensor node in which the event occurs and the GPS information of latitude, longitude and altitude are updated and transmitted to the sensor node, It is desirable to update the smart CCTV module and the control server.

The smart CCTV module comprising: A GPS information collection module for collecting GPS information including latitude, longitude and altitude coordinate data; A PTZ control module for controlling the orientation of the CCTV camera by calculating left and right up and down movement values according to a sensor node position, a smart CCTV module position, and a current CCTV camera orientation position received from the sensor node; An image capturing module for acquiring image information from the CCTV camera; A storage module for updating and storing the CCTV camera-oriented location; A control server for collecting information of the sensor node by controlling the GPS information collection module, the PTZ control module, the image capture module, and the storage module, for connecting the control client of the control integration server and transmitting collected information, And a streaming server connected to the streaming client of the integration server to convert the real-time image of the image capture module into Real-time Transport Protocol (RTP) or Real-Time Streaming Protocol (RTSP) packet format and transmit the packet via a WIFI or wired LAN do.

The horizontal and vertical movement values of the CCTV camera calculated by the PTZ control module may be calculated by the following equations (1) to (5).

[Equation 1]

(Km)

(Km)

&Quot; (2) "

(Km)

(Km)

&Quot; (3) "

&Quot; (4) "

(m)

(m)

&Quot; (5) "

Where D1 is the distance between the CCTV camera location and the current CCTV directing location,

D2 is the distance between the CCTV camera position and the event generating sensor node position,

a0, b0, c0 are the latitude, longitude, altitude,

a1, b1, c1 are the latitude, longitude, altitude,

a2, b2, c2 are the latitude, longitude, altitude,

θ is the CCTV camera moving angle,

h CCTV camera height up and down,

δ is the CCTV camera vertical movement angle.

The PTZ control module may include a pan tilt driver for horizontally rotating the CCTV camera and a PTZ control receiver for controlling the operation of the pan tilt driver.

Preferably, the storage module includes a hard disk (HDD), and the CCTV camera is a high definition HD-SDI CCTV camera.

A method of controlling a smart security CCTV system based on a wireless sensor network according to the present invention comprises the steps of: A) detecting an event occurrence of an object at a sensor node and transmitting its ID and GPS information; B) From the GPS information transmitted from the sensor node in the smart CCTV module, the distance between the CCTV camera position and the event generating sensor node position, and the distance between the current CCTV directing position and the event generating sensor node position, Controlling PTZ (Pan-Tilt Zooming), capturing an image from the CCTV camera, storing and transmitting the captured image; And C) receiving an event from the smart CCTV module at the control integration server, confirming the event, and remotely controlling the smart CCTV module in real time to receive a local situation.

The GPS information includes: Latitude, longitude, and altitude coordinate data.

When the sensor node senses an event from the sensing collection module in the sleep state, the sensor node is converted into an active state, and the ID of the sensor node where the event occurs and the GPS information of latitude, longitude and altitude are updated and stored And can update the smart CCTV module and the control server.

Wherein said step B comprises: Collecting GPS information including latitude, longitude and altitude coordinate data in a GPS information collection module of a smart CCTV module; Controlling directional position of the CCTV camera by calculating left and right up and down movement values according to the position of the smart CCTV module, the sensor node position, and the current CCTV camera orientation position from the GPS information collection module in the PTZ control module; Acquiring image information from the CCTV camera in a video capture module; Updating and storing the current CCTV camera-oriented position in the storage module; Controlling the GPS information collection module, the PTZ control module, the image capture module, and the storage module in the control server to collect information of the sensor node, and connecting the control client of the control integration server to transmit the collected information; A streaming server is connected to a streaming client of the control integration server to convert a real-time image of the image capture module into a Real-time Transport Protocol (RTP) or Real-Time Streaming Protocol (RTSP) packet format, .

According to the wireless sensor network-based smart security CCTV system and control method thereof according to the present invention configured as described above, it is possible to efficiently control the PTZ camera so as to track a wide area moving object while reducing the amount of calculation required for image processing, In addition, the wireless mesh network is implemented so that the sensor nodes can be mounted flexibly, thereby improving the installation efficiency.

That is, the smart security CCTV system according to the present invention can reproduce the HD-level video by recording and wirelessly in a situation where the cable installation is difficult or the CCTV camera installation position frequently moves due to the installation environment problem. Smart CCTV module can compress HD video with H.264 codec, save it to HDD or SSD, transmit it to wired / wireless network, and control pan / tilt PTZ control receiver with wired / wireless. Also, like other NVR (Network Video Recorder), there are functions such as motion detection storage function, storage device error warning, and firmware upgrade.

In addition, since the conventional system stores image information in the storage device of the central station, it can not store the image information when the cable can not be installed or the image can not be transmitted due to the transmission line abnormality. However, Device together and stores the image information in the storage device of the smart CCTV module and then transmits the image information to the central control station, thereby preventing the image storage failure.

In order to overcome the limitations of the object tracking technology based on image information, the present invention is a new object tracking system that does not depend on image information. The mesh network technology applying the IEEE 802.15.4 standard based on the wireless sensor network is a high- We implemented a system that can efficiently control the PTZ camera so that it can track the wide area moving object while preventing the calculation amount problem and image analysis torques required for image processing.

FIG. 1 and FIG. 2 are block diagrams illustrating a smart sensor network based smart security CCTV system according to a preferred embodiment of the present invention.
3 is a conceptual diagram for explaining a CCTV PTZ movement calculation method.
FIG. 4 and FIG. 5 are flowcharts illustrating a method of controlling a smart security CCTV system based on a wireless sensor network according to a preferred embodiment of the present invention.
6 is a diagram illustrating an image processing procedure of a smart CCTV module according to the present invention.
FIG. 7 illustrates a protocol state transition diagram between a smart CCTV module and a central station of the present invention; FIG.
8A to 8F are diagrams showing a file transfer protocol according to each situation between the smart CCTV module and the central control station of the present invention. FIG. 8A shows protocol version synchronization, FIG. 8B shows general data transmission, FIG. 8D shows data transmission according to a duplicated ACK, FIG. 8E shows data transmission according to data loss, and FIG. 8F shows FIN data transmission.
9 is a diagram illustrating a sensor node receiving a beacon message from a smart CCTV module and a mode according to an application operation;
10 is a diagram illustrating route information generation and data transmission.
11 is a diagram showing that erroneous path formation has occurred due to erroneous broadcasting;
12 is a diagram illustrating a hop group time division of a network in accordance with path generation;
13 is a diagram illustrating a proposed super frame to which time division allocation of broadcasting is applied.

The present invention may have various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are block diagrams illustrating a smart sensor network based smart security CCTV system according to a preferred embodiment of the present invention.

1, a smart sensor network-based smart security CCTV system according to an exemplary embodiment of the present invention includes a high definition HD-SDI CCTV camera 201, a pan tilt driver 202, a PTZ control receiver 203, A smart CCTV module 200 including a hard disk (HDD) 204, and a sensor node 100 and a control integration server 300. [

The smart CCTV module 200 is a main component of the system and serves as a server for controlling and managing the entire system.

The sensor node 100 wirelessly transmits its ID and GPS coordinate data (latitude, longitude, and altitude) to the smart CCTV module 200 when it detects an event such as an object recognition or an impact.

The smart CCTV module 200 rotates the pan tilt driving unit 202 left and right in the direction of the sensor node 100 that senses the abnormality and captures a specific image with the CCTV camera 201, . And transmits to the central control station 301 that an abnormal signal has been detected.

Accordingly, the central controller 301 can search the transmitted image to check the status. In addition, the smart CCTV module 200 can be remotely controlled in real time to receive local conditions.

FIG. 2 is a flowchart illustrating a flow of a control signal and image data of a smart security CCTV system based on a wireless sensor network according to an exemplary embodiment of the present invention. Referring to FIG.

As described above, when the sensor node 100 detects an event such as an object recognition or an impact, the sensor node 100 wirelessly transmits its ID and GPS coordinate data (latitude, longitude, and altitude).

For this, the sensor node 100 includes a wireless network control module 110 and a sensing collection module 120. The sensing collection module 120 collects acceleration information, temperature information, humidity information, and GPS information as various types of sensing information. The wireless network control module 110 transmits information collected by the sensing collection module 120 to a wireless standard signal Lt; / RTI >

The smart CCTV module 200 includes a control server 260 for collecting information of the sensor node 100 and connecting to the control client 310 and a streaming server 250 for connecting to the streaming client 320, The servers 260 and 250 control all the functions of the smart CCTV module 200.

The sub module for controlling the functions of the smart CCTV module 200 includes a GPS information collection module 210, a PTZ control module 220, an image capture module 230, and a storage device module 240.

The GPS information collection module 210 acquires GPS information of the smart CCTV module 200 including latitude, longitude, and altitude. When an event is detected from the acceleration sensor as an example of the sensing collection module 110 in the sleep state of the sensor node 100, the sensor node 100 is converted into the active state, and the identification ID of the sensor node 100 And GPS information of latitude, longitude and altitude are transmitted and updated to the smart CCTV module and the control server.

Meanwhile, the smart CCTV module 200 obtains latitude, longitude and altitude GPS information from the GPS information collection module 210 and acquires GPS information of the current location of the CCTV camera 201. When the location information of the sensor node 100 is received, the CCTV camera 201 calculates the horizontal and vertical movement values based on the sensor node location, the location of the smart CCTV module and the current CCTV camera orientation, In the direction of the arrow.

Then, the image capture module 230 acquires image information from the CCTV camera 201, and updates and stores the current CCTV camera-oriented position in the storage module 240. [

The control server 260 transmits the operation requested by the user to the submodules 210 to 240 and transmits the resultant data to the user and the warning message and sensing information transmitted from the sensor node 100.

The streaming server 250 converts a real-time image of the image capture module 230 into a real-time transport protocol (RTP) or a real-time streaming protocol (RTSP) packet format and transmits it to the control integration server 300 through a WIFI or a wired LAN. As shown in FIG.

The user can control the camera through the control client 310 of the control integration server 300. The streaming client 320 decodes the real time streaming data transmitted through the WIFI or the wired LAN and displays the decoded streaming data on the screen.

3 is a conceptual diagram for explaining the CCTV PTZ movement calculation method in detail.

As shown, the distance D1 between the CCTV camera position and the current CCTV directing position can be expressed by the following equation (1).

In addition, the distance D2 between the CCTV camera position and the event generating sensor node position can be expressed by the following equation (2).

A1, b1, and c1 are the latitude, longitude, and altitude of the current CCTV-oriented location, and a2, b2, and c2 are the latitude, longitude, and altitude of the event- , Longitude, and altitude.

According to Equations (1) and (2), the CCTV camera swing angle?, CCTV camera swing height h, and CCTV camera swing angle? Can be expressed by the following Equations 3 to 5.

4 and 5 are flowcharts illustrating a method of controlling a smart security CCTV system based on a wireless sensor network according to a preferred embodiment of the present invention.

A method of controlling a smart security CCTV system based on a wireless sensor network according to the present invention comprises the steps of: A) detecting an event occurrence of an object at a sensor node and transmitting its ID and GPS information; B) a geographic distance based on the distance between the CCTV camera position and the event generating sensor node position and the distance between the current CCTV directing position and the event generating sensor node position from the GPS information transmitted from the sensor node and the GPS information of the smart CCTV module in the smart CCTV module Controlling PTZ (Pan-Tilt Zooming) of the CCTV camera through calculation, capturing an image from the controlled CCTV camera, storing the captured image in the CCTV camera, and transmitting the captured image to a control integration server; And C) checking the status of the image transmitted from the smart CCTV module at the control integrated server and remotely controlling the smart CCTV module in real time to receive the local situation.

The GPS information includes: Latitude, longitude, and altitude coordinate data.

As shown in FIG. 4, the sensor node collects initial GPS information (S101), and when an event is sensed from the sensing collection module in the sleep state (S102 to S103), the sensor node is converted into an active state (S104) (GPS) information of the sensor node in which the event occurred and latitude, longitude and altitude GPS information to the smart CCTV module and update the smart CCTV module and the control server in steps S105 to S106.

The step B may further include: Collecting GPS information including latitude, longitude and altitude coordinate data in the GPS information collection module (S201 to S203); Controlling a directivity position of the CCTV camera by calculating right and left and up and down movement values according to a sensor node position, a smart CCTV module position, and a current CCTV camera directing position received from the sensor node in the PTZ control module S204 to S205); Acquiring image information from the CCTV camera in a video capture module (S206); Updating and storing the current CCTV camera-oriented position in the storage module; Controlling the GPS information collection module, the PTZ control module, the image capture module, and the storage module in the control server to collect information of the sensor node, and connecting the control client of the control integration server to transmit the collected information; A streaming server is connected to a streaming client of the control integration server to convert a real-time image of the image capture module into a Real-time Transport Protocol (RTP) or Real-Time Streaming Protocol (RTSP) packet format, (S207 to S208).

Hereinafter, an image processing method of a smart CCTV module according to the present invention, a data transmission method between a smart CCTV module and a central station, and a method of routing a wireless sensor network between a smart CCTV module and a sensor node will be described in detail.

First, in the image processing method for data transmission of a smart CCTV module, a large amount of traffic is generated and a large storage space is required to transmit and store a high-quality image. Therefore, we need an algorithm to compress the image taken from the CCTV and perform this function in the smart CCTV module.

The image processing procedure of the smart CCTV module 204 is as shown in FIG.

First, the video received from the CCTV camera 201 is converted into a signal easy for video processing through an HD-SDI signal decoder 205, and the video of the video capture interface (TI 8168) Connect to the Video Capture input. Thereafter, the data of the video capture interface 206 is transferred to the DSP 207 to extract necessary information, and the processed image is processed as a compressed image through a hardware H.264 encoder 208. This video is used for RTP streaming and disk storage images. In FIG. 5, the flow of the image is divided into a solid line and the information extracted from the image is divided into a dotted line.

7, a file transfer method between the smart CCTV module 204 and the centralized control server 301 of the central control station 301, as shown in FIG. 7, The protocol for transmission is designed.

7 shows a protocol state transition diagram between the smart CCTV module 204 and the control integration server 300 of the central station 301. [

Since the file transfer protocol is based on UDP / IP, separate flow control is used to secure transmission efficiency and it operates according to the above state diagram.

The state of the file transfer protocol is divided into a protocol version matching process (Init), a transmission state running (Running), and a flow control state (Pause) except for the start and end states.

During the transmission, the station enters the stationary state in all cases other than the normal transmission state. The file transfer between the smart CCTV module 200 and the control integration server 300 of the central station 301 is performed by the protocol state transition diagram.

8A), data transmission (general case) (FIG. 8B), data transmission (ACK loss) (FIG. 8C), data (Duplicated ACK) (FIG. 8D), data transmission (data loss) (FIG. 8E), and data transmission (FIN) (FIG. Let's look at the operation in more detail.

First, FIG. 8A shows protocol version synchronization between the smart CCTV module and the central station. If the protocol version is different, it works according to the lower version. When the protocol version of the client is 2 and the protocol version of the server is 1, the server verifies that the version information of the received INFO packet is different and transmits its protocol version to the INFO + ACK packet. Since the received protocol version is lower than its protocol version, the client modifies the version information of the INFO packet and retransmits it. Both ends transmit and receive the same protocol version number. INFO or INFO + ACK packet offset Field is incremented by 1 in the offset field value of the received packet, and the value is checked to determine whether the packet is received or not.

8 (b) shows data transmission (in general case) between the smart CCTV module and the central station. If a DATA + ACK packet is received for all transmitted DATA packets, it is recognized as a normal state and the amount of DATA packets transmitted at one time is increased by 2 times. If no DATA + ACK is received within the retransmission timeout period, the previously transmitted DATA packet is retransmitted.

8 (c) shows data transmission (ACK loss) between the smart CCTV module and the central station. If the DATA + ACK packet is not received, the DATA + ACK packet is retransmitted in order from the DATA packet that did not receive the packet. The amount of DATA packets transmitted at one time is unchanged.

8 (d) shows data transmission (duplicate ACK) between the smart CCTV module and the central station. When the DATA + ACK packet is received redundantly, it corresponds to the case where the retransmission is faster than the DATA + ACK transmission time of the other, so the Re-transmission timeout time is increased.

8 (e) shows data transmission (data loss) between the smart CCTV module and the central station. When a DATA + NAK packet is received, it is transmitted in order from the DATA packet corresponding to the received DATA + NAK packet after the ACK wait time elapses. When the DATA + NAK packet is received, the amount of the DATA packet transmitted at one time is decreased by 2 times.

8 (f) shows data transmission (FIN) for transmission termination between the smart CCTV module and the central station. When finishing the transmission, the FIN packet is transmitted and the FIN + ACK packet is exchanged to confirm the transmission end. Even if the FIN + ACK packet is not received, it is recognized that the transmission is completed when the FIN waiting time elapses after the transmission / reception of the FIN packet.

In a smart security CCTV system based on wireless sensor networks, CCTV deploys sensor tags near CCTV to track moving objects without missing. When sensor node detects an abnormality such as movement of object, it transmits the information to smart CCTV module. Based on the information received, the smart CCTV module tracks the object by moving the pan tilt vertically and horizontally. Wireless sensor nodes are needed for this purpose, and sensor nodes need a wireless sensor network to transmit information to the smart CCTV module.

Therefore, according to a preferred embodiment of the present invention, wireless network routing for monitoring an external environment can be implemented based on the proposed operation scenario. The wireless sensor network of the system is defined as a self network network in which the IEEE 802.15.4 RF module of the smart CCTV module is designed to monitor the external environment by mounting the sensor tag at an arbitrary place on the assumption that the system can move. The sensor network adopts the IEEE 802.15.4 based communication method and basically supports the low power operation and applies the mesh routing and the ad-hoc technology to facilitate the installation at any place. In other words, the network of the system is designed to monitor external environment (temperature, humidity, impact, position) based on 30 sensor nodes (up to 100 expansion), uses IEEE 802.15.4 transmit / receive primitive, And it is designed to guarantee mobility.

Source routing scheme is adopted for message transmission. In the source routing scheme, a source node transmits a data packet to all other neighbor nodes, data transmission is made to a destination node, each node stores data, To the node. The source routing scheme is easy to implement, but because neighboring data is delivered to the same node or two nodes receive the same information, neighboring nodes receive redundant data and do not consider power consumption. There is a problem that it can not be done. The protocol can be designed to take this problem into account.

The basic element of smart CCTV module and sensor tag participation in the network is based on beacon message. Beacon messages include time synchronization of the network structure, routing path formation, and user request messages. The sensor tags are divided into a non-beacon mode (S301), a beacon mode (S302), and a real-time monitoring mode (S303) as shown in FIG. 9 depending on whether a smart CCTV module receives a beacon message and an application operation. Considering this operation mode and the maximum number of supported sensor nodes participating in the sensor network, a sensor network routing service protocol suitable for monitoring can be designed.

The monitoring network routing path adopts the source routing method using the beacon message of the smart CCTV module. For this purpose, the beacon message includes a packet identification number (PCK SEQ), a beacon identification number (BEACON SEQ), an original sender address (ORIGIN SRC), a current sender address (SRC), a hop count (HOP CNT) ... < / RTI > Using the information contained in the beacon message, the path information is generated by tracing the reverse path of the smart CCTV module in which the original message is generated and the address of the sensor tag retransmitted in a table-driven manner.

FIG. 10 is a diagram illustrating route information generation and data transmission. In the figure, the D-node corresponds to a smart CCTV module as a beacon message generator. The beacon message generated from the D-node is transmitted to C, B, and A, where each node stores the information of the D-node where the first beacon was generated through the ORI SRC information as the final destination address (ORI DST) The information of the node which transmitted the beacon message last is stored as the next destination address (NEXT DST). Then, when routing from A to C to D, network routing is designed to always use only the next destination address (NEXT DST) address.

IEEE 802.15.4 supports super frame which can be selectively operated according to various application fields. The superframe is divided into an active section and an inactive section based on a beacon interval (BI). The activation interval SD (Superframe Duration) is composed of CAP (Contention Access Period) and CFP (Contention Free Period). CAP is a period in which network devices compete based on CSMA / CA. In CFP, since only devices reserved and accessed can be accessed without competition, it is coordinated by the coordinator so that most devices can receive without transmission. Therefore, in the superframe structure of the reserved IEEE 802.15.4 in the CFP section, when the number of participating nodes is increased or the path is reset due to the movement of assets in the network, nodes of the hop group higher than the node of the low hop group are received first Broadcasting of beacons may result in unnecessary power consumption as traffic increases due to unexpected routing paths and the network's hop structure is deepened.

As shown in FIG. 11, a specific node corresponding to the 3-hop group is broadcast to T: 3 earlier than the 2-hop group node. This leads to erroneous path formation.

In order to prevent the unnecessary waste of resources and structurize the network stably, in the network of the smart security CCTV system, when the central network of the smart CCTV module is formed, a low hop group The transmission right of broadcasting is given priority to the sensor node, and the time for the specific hop group is designed to be divided.

Therefore, it is possible to improve the reliability of communication by enjoying the cost advantage due to the optimal path and traffic reduction even if the transmission time is damaged. 12 shows the hop group time division of the network. In FIG. 12, T: 1 to T: 5 in the 0-hop group, T: 6 to T: 10 in the 1-hop group, 15, and 3-hop groups are allocated to T: 16 to T: 20 to control the broadcasting priority in a time division manner. This prevents unnecessary path formation and effectively structures the entire network.

As shown in FIG. 13, the proposed superframe employing time division allocation of broadcasting is composed of up to four hop sections unlike IEEE 802.15.4. And DTP (Data Transfer Period) in which FAP (Fixed Access Period) and data transmission are separated. In the FAP, the sensor tags belonging to each hop group processed the routing path reset and user request command, separated the data transmission, and separated the data transmission into the DTP section and the separate section for the message transmission section.

Also, the DTP section has EM data section for emergency message event processing and nTag data section for periodic data processing that does not require urgency. The number of hop sections can be variably set according to the data transmission distance, and the number (n) of nTag data can be adjusted in consideration of the traffic that can be generated in the network according to the number of sensor tags participating in the network.

The embodiments of the present invention described in the present specification and the configurations shown in the drawings relate to the most preferred embodiments of the present invention and are not intended to encompass all of the technical ideas of the present invention so that various equivalents It should be understood that water and variations may be present. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments, and that various modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. , Such changes shall be within the scope of the claims set forth in the claims.

100: sensor node
110: Wireless network control module
120: Sensing acquisition module
200: Smart CCTV module
210: GPS information collection module
220: PTZ control module
230: image capture module
240: storage module
250: Streaming server
260: control server
300: Control Integration Server
310: control client
320: Streaming Client

Claims (13)

A sensor node for detecting an event occurrence of an object and transmitting its ID and GPS information;
The distance between the CCTV camera position and the event generating sensor node position from the GPS information transmitted from the sensor node and the GPS information of the CCTV camera, and the distance between the current CCTV directing position and the event generating sensor node position, A smart CCTV module for controlling PTZ (Pan-Tilt Zooming) of the CCTV camera and capturing, storing and transmitting the image of the CCTV camera; And
And a control integration server for receiving an event from the smart CCTV module, checking the event, and remotely controlling the smart CCTV module in real time to receive a local situation,
The sensor node comprising:
Further comprising a sensing collection module for collecting at least one of acceleration, temperature, humidity, and GPS information according to an occurrence of an event;
The sensor node comprising:
When an event is detected from the sensing collection module in the sleep state, the sensor node is converted into an active state, and the GPS ID of the sensor node in which the event has occurred and the GPS information of latitude, longitude and altitude are transmitted, Wherein the wireless sensor network is updated to the server. The method according to claim 1,
The GPS information includes:
Wireless sensor network based smart secure CCTV system that includes latitude, longitude and altitude coordinate data. The method according to claim 1,
The sensor node comprising:
And a wireless network control module for transmitting the collected information from the sensing collection module to the control integrated server through a wireless standard signal. delete The method according to claim 1,
The smart CCTV module comprising:
A GPS information collection module for collecting GPS information including latitude, longitude and altitude coordinate data;
A PTZ control module for controlling the orientation of the CCTV camera by calculating left and right up and down movement values according to a sensor node position, a smart CCTV module position, and a current CCTV camera orientation position based on GPS information received from the sensor node;
An image capturing module for acquiring image information from the CCTV camera;
A storage module for updating and storing the current CCTV camera-oriented location;
A control server for collecting information of the sensor node by controlling the GPS information collection module, the PTZ control module, the image capture module, and the storage module, for connecting the control client of the control integration server and transmitting collected information,
A streaming server for converting a real-time image of the image capture module into a real-time transport protocol (RTP) or real-time streaming protocol (RTSP) packet format in connection with a streaming client of the control integration server, Wireless sensor network based smart security CCTV system. 6. The method of claim 5,
Wherein the horizontal and vertical movement values of the CCTV camera calculated by the PTZ control module are calculated by the following equations (1) to (5).
[Equation 1]

(Km)
&Quot; (2) "

(Km)
&Quot; (3) "

&Quot; (4) "

(m)
&Quot; (5) "

Where D1 is the distance between the CCTV camera location and the current CCTV directing location,
D2 is the distance between the CCTV camera position and the event generating sensor node position,
a0, b0, c0 are the latitude, longitude, altitude,
a1, b1, c1 are the latitude, longitude, altitude,
a2, b2, c2 are the latitude, longitude, altitude,
θ is the CCTV camera moving angle,
h CCTV camera height up and down,
δ is the CCTV camera vertical movement angle. 6. The method of claim 5,
The PTZ control module
A pan tilt driver for horizontally rotating the CCTV camera,
And a PTZ control receiver for controlling operation of the pan tilt driver. 6. The method of claim 5,
Wherein the storage module comprises a hard disk drive (HDD). The method according to claim 1,
Wherein the CCTV camera is a high definition HD-SDI CCTV camera. A) detecting an event occurrence of an object at the sensor node and transmitting its ID and GPS information;
B) From the GPS information transmitted from the sensor node in the smart CCTV module, the distance between the CCTV camera position and the event generating sensor node position, and the distance between the current CCTV directing position and the event generating sensor node position, Controlling the PTZ (Pan-Tilt Zooming), capturing an image from the CCTV camera, storing and transmitting the captured image; And
C) receiving the local situation by remotely controlling the smart CCTV module in real time by searching the image received from the smart CCTV module at the control integration server to confirm the event,
In the step A, the sensor node comprises: When an event is detected from the sensing collection module in the sleep state, the sensor node is converted into an active state, and the GPS ID of the sensor node in which the event occurred and the GPS information of latitude, longitude and altitude are transmitted, Wherein the control unit updates the wireless sensor network-based smart security CCTV system. 11. The method of claim 10,
The GPS information includes:
A method for controlling a smart security CCTV system based on a wireless sensor network including latitude, longitude and altitude coordinate data. delete 11. The method of claim 10,
Wherein said step B comprises:
Collecting GPS information including latitude, longitude and altitude coordinate data in a GPS information collection module;
Controlling a directional position of the CCTV camera by calculating left and right up and down movement values according to a sensor node position, a smart CCTV module position, and a current CCTV camera orientation position received from the GPS information collection module in the PTZ control module;
Acquiring image information from the CCTV camera in a video capture module;
Updating and storing the current CCTV camera-oriented position in the storage module;
Controlling the GPS information collection module, the PTZ control module, the image capture module, and the storage module in the control server to collect information of the sensor node, and connecting the control client of the control integration server to transmit the collected information;
A streaming server is connected to a streaming client of the control integration server to convert a real-time image of the image capture module into a Real-time Transport Protocol (RTP) or Real-Time Streaming Protocol (RTSP) packet format, Wherein the method comprises the steps of:

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